Telephone transmitter



Nov. 7, 1939. A. c. REID 2,179,102

TELEPHONE TRANSMI TTER Filed Aug. 20, 1957 .Zz/m y Maa Patented Nov. 7, 1939 anales rArENr ortica TELEPHONE TRANSMITTER Alexander C. Reid, Genoa, Ill., assigner to Leich Electric Co., Genoa, Ill., a corporation of lllinois Application August 20, 1937, `Serial No. 160,134

4 Claims.

'Ihe present invention relates to improvements in telephone transmitter equipment and more particularly to a combined mouthpiece and transmitter supporting means for telephones.

t is the principal purpose of this invention to provide a single molded unit of insulating material which on one side has a mouthpiece formed so as to enable the user to place the lips nearer to the transmitter diaphragm and which on the other side is recessed to receive a transmitter unit.

It is also a purpose of this invention to provide a device of this character wherein the transmitter unit is so mounted as to permit ready detachment thereof in order that the mouthpiece may be cleaned quickly and kept in a sanitary condition.

The features and advantages of the invention will appear more readily as the description proceeds in connection with the accompanying drawing wherein a preferred form of the invention is shown. It is to be understood, however, that the drawing and description are illustrative only and are not to be taken as limiting the invention except in so far as it is limited by the claims.

In the drawing- Fig. 1 is a View in side elevation of the transmitter and mouthpiece looking at the unit from the side where the transmitter is mounted; and

Fig. 2 is a sectional View through the mouthpiece and transmitter support taken on the line 2--2 of Fig. 1.

Referring now to the drawing, the invention is shown as embodied in a molded body which is molded of a suitable composition such as the synthetic resins known under the trade name of Bakelite. This composition is a good insulating material and in addition can be molded so as to provide a smooth iinished surface. The molded body 5 is formed with a thick annular rib i5 projecting at one side and is recessed inwardly at the other side as indicated at l. The recess l provides a seat for a transmitter unit 8. As shown the recess 'l is formed to t the surface of the transmitter unit 8 having an inner depression 9 surrounded by a more shallow depression lil in which the rim I i of the transmitter unit fits.

The molded body 5 has a rim portion l2 in which four pins i3, i4, l5, and it are seated. Each of these pins has a flange ll and an enlarged head I8 separated by a neck portion i9 of reduced diameter. The annular flange ll of the pin rests upon the rim l2. A spring ring 2i? has its opposite ends turned out as indicated at 2l and 22 to hood under the heads of the pins i3 and iii. The intermediate portions of the ring 26 fit under the heads of the pins lll and i5. The spring ring 2li holds a washer 23 which is in the form of a iiat ring of insulating material against the back of the transmitter unit 8 to clamp it in position in the body 5. The body 5 has a partition 2A between the recess l and the interior 25 of the annular rib t'. The partition 2li is provided with a series of openings 2l" and 28. The openings 28 as shown expand toward the recess 'l and enter upon the interior of the rib from the side rather than directly through the partition 2G.

The present construction is such that the transmitter1 unit 8 is placed much closer to the mouth of the speaker than has heretofore been customary. Also, the single piece molding 5 with its thick annular rib 6 serving as a mouthpiece is quite effective in eliminating any distortion because there are no dead air chambers between the transmitter and the mouthpiece which would be set in vibration by the Voice waves of the speaker. The device is more readily cleaned than the old type of mouthpiece since it is an easy matter to detach the transmitter unit and gain access to the entire interior and exterior of the molding 5.

Having thus described my invention, what l.' claim as new and desire to secure by Letters Patent is:

l. A combined mouthpiece and transmitter support comprising a molded body of insulating material having a thick annular rib forming a mouthpiece portion projecting from one side and a transmitter unit recess in the other side with an apertured partition between the mouthpiece opening and said recess, and means for clamping a transmitter unit into said recess, said means comprising a series of grooved posts around said recess, a spring seated in said grooves and a ring of insulating material overlying the transmitter unit and held in place by said spring.

2. A telephone transmitter support and mouthpiece comprising a body of insulating material having an annular raised rib on one side thereof providing a mouthpiece portion, said body having a transmitter unit receiving recess in the side thereof opposite the raised rib, said body having openings therethrough from the recess to the surface within said rib, said body having a mounting rim around said transmitter unit receiving recess, and means carried by said rim for clamping a transmitter unit in said recess.

3. A telephone transmitter support and mouth-- piece comprising a body of insulating material having an annular raised rib on one side thereof providing a mouthpiece portionsaid body having a transmitter unit receiving recess in the side thereof opposite the raised rib, said body having openings therethrough from the recess to the surface Within said rib, said body having a mounting rim around said transmitter unit receiving recess, and means carried by said rim for securing a transmitter unit in said recess, said 10 last named means comprising posts xed in said mounting rim, a securing ring of insulating material covering the peripheral edge of said recess and a spring ring cooperating with said posts to 

